public function add_buildings()
{
for ($i = 0; $i < $this->buildcount; $i++) {
$building = new Building($i + 1, rand(1, 16), rand(1, 6), rand(4, 6), rand(1000, 2000));
$building->addflats();
$this->arr_of_buildings[] = $building;
//$building->display();
}
}